Hackernews posts about Quad9

Quad9 is a fast-growing public Domain Name System (DNS) provider that aims to offer an alternative to traditional DNS services by providing a free and open platform for users worldwide.

1. QuadRF can spot drones and see WiFi through my wall (www.jeffgeerling.com)
   751 points by speckx 6 days ago | 237 comments
2. Why does kinetic energy increase quadratically, not linearly, with speed? (2011) (physics.stackexchange.com)
   381 points by ProxyTracer 20 days ago | 215 comments
3. Quadrupling code performance with a "useless" if (purplesyringa.moe)
   112 points by birdculture 4 days ago | 29 comments
4. Seeing the world in radio waves with the QuadRF (hackaday.com)
   56 points by ikbdsk 26 days ago | 6 comments
5. Micron stock jumps 12% as memory crunch lead to quadrupling of revenue (www.cnbc.com)
   34 points by mgh2 22 days ago | 12 comments
6. Optimizing an algorithm that's quadratic by design (whatchord.earthmanmuons.com)
   25 points by elasticdog 14 days ago | 4 comments
7. QuadRF, a modular 4x4 MIMO beamforming tile built with an open antenna arch (www.youtube.com)
   4 points by tekacs 27 days ago | discuss
8. Make systemd better for Podman with Quadlet (2023) (www.redhat.com)
   3 points by rldjbpin 14 days ago | discuss
9. Deep dive: Quad storage for optimal throughput and latency (blog.canoozie.net)
   2 points by jtregunna about 20 hours ago | 1 comments
10. Agile perceptive multi-skill locomotion for quadrupedal robots in the wild (skillquadsr.github.io)
    2 points by ilreb about 13 hours ago | discuss
11. Scaling a 1.59 quadrillion-row logging system across three clouds (clickhouse.com)
    2 points by saisrirampur 14 days ago | discuss
12. SubQ – a sub-quadratic LLM built for multi-million token reasoning (subq.ai)
    2 points by modinfo 28 days ago | discuss
13. QuadRF – Modular 4x4 MIMO beamforming tile. SDR in the spatial domain. (www.youtube.com)
    1 points by mhb 8 days ago | discuss
14. Show HN: Autonomous CAD design and OpenFOAM optimization loop using local LLMs (github.com)
    1 points by ostenjap 19 days ago | discuss
15. A 4x4 MIMO SDR tile for spatial RF vision and beamforming (www.crowdsupply.com)
    13 points by supermdguy 7 days ago | 3 comments
16. China-made CXMT memory now supports faster speeds on MSI's AMD motherboards (www.tomshardware.com)
    8 points by binyu 4 days ago | discuss
17. Seeing Radio Waves at 30fps (www.crowdsupply.com)
    3 points by mrtnmcc 21 days ago | discuss
18. SDR tiles for spatial RF vision and beamforming that scales as a phased array (www.crowdsupply.com)
    2 points by Confiks 16 days ago | discuss
19. Fibonacci's Liber Abaci [pdf] (www.mifami.org)
    1 points by jruohonen 2 days ago | discuss
20. Lessons from a Year of Exploring Common Ground (americans-agree.org)
    3 points by quadtree 12 days ago | discuss
21. DNS Provider Quad9 Sees Piracy Blocking Orders as "Existential Threat" (torrentfreak.com)
    268 points by gslin 8 months ago | 116 comments
22. Top DNS domains seen on the Quad9 recursive resolver array each day (github.com)
    160 points by speckx about 1 year ago | 97 comments
23. Quad9 DOH HTTP/1.1 Retirement, December 15, 2025 (quad9.net)
    103 points by pickledoyster 8 months ago | 61 comments
24. Quad9 Enables DNS over HTTP/3 and DNS over QUIC (quad9.net)
    69 points by itchingsphynx 4 months ago | 17 comments
25. Quad9 – A public and free DNS service for a better security and privacy (www.quad9.net)
    63 points by janandonly over 1 year ago | 30 comments
26. French Piracy Blocking Order Goes Global, DNS Service Quad9 Vows to Fight (torrentfreak.com)
    36 points by latexr over 1 year ago | 22 comments
27. Quad9 Enables DNSSEC on All Service Endpoints (quad9.net)
    11 points by bernd289 3 months ago | discuss
28. Quad9 9.9.9.9 DNS queries *from Germany* slow today
    3 points by oriettaxx 6 months ago | 3 comments
29. DNS4EU, DNS0, Quad9: review of European public DNS resolvers (blog.frehi.be)
    2 points by amai 11 months ago | discuss
30. Show HN: CDNs – A simple Go CLI to switch DNS servers in one second (github.com)
    1 points by unsorted2270 5 months ago | discuss
31. What Happens When You Interfere with the Infrastructure of the Internet (quad9.net)
    7 points by fodmap 11 months ago | discuss
32. When Enforcing Copyright Starts Breaking the Internet's Plumbing (quad9.net)
    5 points by HotGarbage 8 months ago | discuss
33. DNSSEC NTAs: No Good Compromises (quad9.net)
    2 points by Velocifyer 4 months ago | discuss
34. An open DNS recursive service for free security and high privacy (quad9.net)
    2 points by doener about 1 year ago | discuss
35. Israel escalates attacks on medics in Lebanon with deadly 'quadruple tap' (www.theguardian.com)
    308 points by tcp_handshaker 3 months ago | 230 comments
36. Quadlet: Running Podman containers under systemd (mo8it.com)
    298 points by gjvc over 1 year ago | 68 comments
37. An interactive intro to quadtrees (growingswe.com)
    222 points by evakhoury 5 months ago | 30 comments
38. Subterranean fungi networks more than 100 quadrillion km in length (www.theguardian.com)
    188 points by tosh about 1 month ago | 45 comments
39. Podman Quadlets with Podman Desktop (podman-desktop.io)
    180 points by teleforce over 1 year ago | 85 comments
40. Apollo DN10000: Quad CPU/128Mb RAM workstation from 1988 [pdf] (jim.rees.org)
    171 points by stare_spb almost 2 years ago | 155 comments
41. Cannabis use associated with quadrupled risk of developing type 2 diabetes (medicalxpress.com)
    161 points by geox 10 months ago | 98 comments
42. The quadratic sandwich (fedemagnani.github.io)
    147 points by mbustamanter about 2 months ago | 15 comments
43. Bilinear interpolation on a quadrilateral using Barycentric coordinates (gpuopen.com)
    143 points by mariuz over 1 year ago | 34 comments
44. Functional Quadtrees (lbjgruppen.com)
    140 points by lbj 7 months ago | 49 comments
45. Expensively Quadratic: The LLM Agent Cost Curve (blog.exe.dev)
    131 points by luu 5 months ago | 81 comments
46. Peng – A minimal Rust-based quadrotor simulation pipeline (github.com)
    130 points by Tycho87 almost 2 years ago | 18 comments
47. Why quadratic funding is not optimal (jonathanwarden.com)
    119 points by jwarden about 1 year ago | 96 comments
48. Closed form arc length parametrization is impossible for quadratic Bézier curves (ninjakoa.la)
    114 points by NinjaKoala almost 2 years ago | 47 comments
49. Show HN: Quadratic – native JavaScript support in a spreadsheet (www.quadratichq.com)
    112 points by Manchego79 almost 2 years ago | 48 comments
50. Functional Flocking Quadtree in ClojureScript (www.lbjgruppen.com)
    103 points by lbj 7 months ago | 12 comments